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Aruncus dioicus ‘Child of Two Worlds’ (photo courtesy of Denver Botanic Gardens)
Aruncus dioicus ‘Child of Two Worlds’ (photo courtesy of Denver Botanic Gardens)

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Zone
Zones vary by species.
Full SunPartial Sun
Full, Partial
Regular Water
Moderate

Aruncus

Goat’s Beard
Rosaceae
Perennials, Flowers

These perennials resemble astilbe, with slowly spreading clumps of finely divided leaves topped in summer by plumy, branched clusters of tiny white or cream flowers. Good in perennial borders or at the edge of a woodland against a dark background.

Aruncus aethusifolius (photo courtesy of Bailey Nurseries, Inc.)
Aruncus aethusifolius (photo courtesy of Bailey Nurseries, Inc.)

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Aruncus aethusifolius

From Korea. Deep green, finely divided leaves make a mound 1 ft. tall and wide. White flower plumes reach 16 in. high. Useful in rock gardens, as edgings, for small-scale groundcover.

Aruncus dioicus ‘Kneiffii’ (photo courtesy of Ball Horticultural Co.)
Aruncus dioicus ‘Kneiffii’ (photo courtesy of Ball Horticultural Co.)

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Aruncus dioicus

Native to Eurasia and to southeastern and south-central Alaska. Grows to 6 (sometimes 7) ft. tall and 4 ft. wide, with foamy plumes of white flowers in 20-in., much-branched clusters. Tolerates more sun than A. aethusifolius. ‘Kneiffii’ is half the size of the species, with more finely divided, near-ferny leaves. ‘Child of Two Worlds’ (‘Zweiweltenkind’) grows to 5 ft. tall, with gracefully drooping flower clusters.

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